INCIDENCE OF DISORDER
The disorder is very uncommon in developed countries but is very widespread in underdeveloped ones.
Retinol is a form of vitamin a found in animal products, while carotene is found in plants. Carotenes are called pro-vitamin
a because when they are absorbed the body turns them to vitamin a
Plant sources of vitamin a include orange and dark green fruits such as sweet potato, mango, spinach and apricots
Vitamin a is essential for normal cell growth although it has not been proven to prevent cancer.
Vitamin a also prevents infertility
Massive overdoses of vitamin a can cause rough skin dry hair and an enlarged liver.
5 FACTS
ORGANIZATION
Child info http://www.childinfo.org/vitamina_progress.html
FAOhttp://www.fao.org/docrep/w0078e/w0078e09.htm
WHOhttp://www.who.int/publications/cra/chapters/volume1/0211-0256.pdf
"Micronutrient deficiencies." WHO. N.p., n.d. Web. 14 Feb. 2014. <http://www.who.int/nutrition/topics/vad/en/>.
"Patient.co.uk - Trusted medical information and support." Patient.co.uk. N.p., n.d. Web. 17 Feb. 2014. <http://www.patient.co.uk/doctor/Vitamin-A-
Deficiency.htm>.
"VITAMIN A PROPERTIES." Properties of vitamin A. N.p., n.d. Web. 17 Feb. 2014. <http://www.botanical-online.com/vitamin_A_properties.htm>.
"VITAMIN A PROPERTIES." Properties of vitamin A. N.p., n.d. Web. 17 Feb. 2014. <http://www.botanical-online.com/vitamin_A_properties.htm>.
"Vitamin A." — QuickFacts. N.p., n.d. Web. 14 Feb. 2014. <http://ods.od.nih.gov/factsheets/VitaminA-QuickFacts/>.
"Vitamin A: MedlinePlus Medical Encyclopedia." U.S National Library of Medicine. U.S. National Library of Medicine, n.d. Web. 17 Feb. 2014.
<http://www.nlm.nih.gov/medlineplus/ency/article/002400.htm>.
"Vitamins All." Vitamins All. N.p., n.d. Web. 15 Feb. 2014. <http://www.vitaminsall.com/vitamin-a-deficiency-symptoms-causes-and-
treatment/>.
"what is vitamin a?what does vitamin a do?." Medical News Today. MediLexicon International, n.d. Web. 17 Feb. 2014.
<http://www.medicalnewstoday.com/articles/219492.php>.
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